Historical Weather in Hillsboro, OR
See 55+ years of weather history for any date in Hillsboro going back to 1970.
Part of Oregon weather history
Look Up a Specific Date
Today in Hillsboro Weather HistorySee records, averages, and 55+ years of data for today's date
→Monthly Climate Averages
Historical temperature and precipitation averages for Hillsboro, OR, based on 55+ years of weather data.
Warmest MonthAugustAvg High: 82°F / Low: 54°F
Coldest MonthDecemberAvg High: 47°F / Low: 35°F
Jan
47°/ 35°
💧 7.3"
❄️ 1.1"
Feb
51°/ 36°
💧 6.3"
❄️ 1.5"
Mar
56°/ 38°
💧 5.5"
❄️ 0.8"
Apr
62°/ 41°
💧 4.1"
May
68°/ 46°
💧 3.9"
Jun
74°/ 50°
💧 4.0"
Jul
82°/ 54°
💧 3.1"
Aug
82°/ 54°
💧 4.4"
Sep
76°/ 49°
💧 5.1"
Oct
64°/ 43°
💧 5.7"
Nov
53°/ 39°
💧 7.4"
❄️ 1.6"
Dec
47°/ 35°
💧 8.2"
❄️ 1.7"
Temperatures in Fahrenheit. Precipitation and snowfall in inches.
Hillsboro Temperature Records
- Record High: The hottest temperature ever recorded in Hillsboro, OR is 114°F, set on June 28, 2021.
- Record Low: The coldest temperature ever recorded in Hillsboro, OR is -4°F, set on December 8, 1972.
- Data Coverage: Based on 29 years of data from NOAA weather station: PORTLAND-HILLSBORO AP.
All-Time Record High
114°F
June 28, 2021
All-Time Record Low
-4°F
December 8, 1972
Monthly Temperature Records in Hillsboro
| Month | Record High | Record Low |
|---|---|---|
| January | 67°F(2005) | -1°F(1979) |
| February | 72°F(1986) | 5°F(1989) |
| March | 84°F(2025) | 13°F(1971) |
| April | 90°F(2016) | 25°F(2008) |
| May | 103°F(1983) | 30°F(1985) |
| June | 114°F(2021) | 32°F(1999) |
| July | 108°F(1998) | 39°F(1977) |
| August | 108°F(1977) | 38°F(2008) |
| September | 104°F(1988) | 30°F(1999) |
| October | 93°F(1988) | 20°F(2002) |
| November | 73°F(2010) | 6°F(1985) |
| December | 67°F(1993) | -4°F(1972) |
Hillsboro Snow RecordsSee the top 10 snowiest days ever recorded
→